31522640212 has 18 divisors (see below), whose sum is σ = 64171089402. Its totient is φ = 13509702864.

The previous prime is 31522640161. The next prime is 31522640243. The reversal of 31522640212 is 21204622513.

It can be written as a sum of positive squares in only one way, i.e., 23090625936 + 8432014276 = 151956^2 + 91826^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80414703 + ... + 80415094.

Almost surely, 2^31522640212 is an apocalyptic number.

It is an amenable number.

31522640212 is an abundant number, since it is smaller than the sum of its proper divisors (32648449190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31522640212 is a wasteful number, since it uses less digits than its factorization.

31522640212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160829815 (or 160829806 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 31522640212 in words is "thirty-one billion, five hundred twenty-two million, six hundred forty thousand, two hundred twelve".